Safety Manual

MS 251, MS 251 C
English
31
Retensioning during cutting work:
N Switch off the engine.
N Loosen the nut.
N Hold the bar nose up.
N Use a screwdriver to turn the
tensioning screw (1) clockwise until
the chain fits snugly against the
underside of the bar.
N While still holding the bar nose up,
tighten down the nut firmly.
N Go to "Checking Chain Tension".
A new chain has to be retensioned more
often than one that has been in use for
some time.
N Check chain tension frequently –
see chapter on "Operating
Instructions".
Retensioning during cutting work:
N Shut off the engine.
N Pull out the hinged clip and loosen
the wingnut.
N Turn the adjusting wheel (1)
clockwise as far as stop.
N Tighten down the wingnut (2) firmly
by hand.
N Fold down the hinged clip.
N Go to "Checking Chain Tension"
A new chain has to be retensioned more
often than one that has been in use for
some time.
N Check chain tension frequently –
see chapter on "Operating
Instructions".
N Shut off the engine.
N Wear work gloves to protect your
hands.
N The chain must fit snugly against
the underside of the bar and it must
still be possible to pull the chain
along the bar by hand when the
chain brake is released.
N If necessary, retension the chain.
A new chain has to be retensioned more
often than one that has been in use for
some time.
N Check chain tension frequently –
see chapter on "Operating
Instructions".
Tensioning the Saw Chain
(side chain tensioner)
1
142BA063 KN
Tensioning the Saw Chain
(quick chain tensioner)
1
2
001BA112 KN
Checking Chain Tension
142BA064 KN